Mean linear red cell velocity for the temporalis muscle in 123 capillaries

Value 1.14 mm/sec
Organism Rat Rattus norvegicus
Reference Ivanov, K., Kalinina, M. and Levkovich, Y. (1981). Blood flow velocity in capillaries of brain and muscles and its physiological significance. Microvascular Research, 22(2), pp.143-155 link abstract, p.152 5th paragraph & p.153 bottom paragraph
Method Abstract: "Intravital microfilming by means of a dark-field contact epiobjective was used for measuring capillary blood flow velocity in the brain and skeletal muscles of the rat. The linear flow rate in capillaries was determined by measuring the rate of motion of plasma-filled “gaps” in the continuous erythrocyte flow."
Comments Abstract: "In the temporalis muscle the velocity was equal to 1.14±0.04 mm/sec in 123 capillaries and 2.43±0.08 mm/sec in 34 arterioles and precapillaries not more than 5 µm in luminal diameter." P.152 5th paragraph: "For the rat temporalis vessels, [investigators] obtained a higher value of the RBC [red blood cell] velocity than reported by other investigators. An average velocity of 1.14±0.08 mm/sec was calculated from 1300 separate measurings with 123 capillaries in 30 rats." P.153 bottom paragraph: "To determine oxygen pressure distribution in a volume of muscle tissue the mathematical calculation was based on capillary density and blood velocity data (Lyabach and Ivanov, 1979). The calculation gave pO2 of 40 torr at the point of lowest oxygen supply. This indicates that temporalis muscle is saturated sufficiently with oxygen when the capillary blood velocity is 1.14±0.08 mm/sec with a density of 330 working capillaries/mm^2."
Entered by Uri M
ID 115134